VilleKrumlinde
commented
3 months ago I can confirm this happening here too.
Please try modifying it like this. That gets rid of the problem here but I'm not sure it is correct.
procedure TCharSet.SubtractRangePtr(aPtr: Pointer);
var ar,r: TRange;
I,M: Integer;
begin
ar.ptr := aPtr;
I := 0;
while I<fList.Count do
with r do
begin
ptr := fList[I];
if from_>ar.to_ then Exit;
if to_>=ar.from_ then
begin
if from_>=ar.from_ then
from_ := ar.to_+1;
if to_<=ar.to_ then
to_ := ar.from_-1;
if from_>to_ then
begin
fList.Delete(I);
Continue;
end
else if from_>ar.to_ then
begin
fList[I] := ptr; Exit;
end;
if to_<ar.from_ then
begin
fList[I] := ptr; Inc(I);
end else begin
M := to_;
to_ := ar.from_-1;
fList.Insert(I,ptr);
from_ := ar.to_+1;
to_ := M;
fLIst[I+1] := ptr;
Exit;
end;
end else Inc(I);
end;
end;
Nico55-vd
Apparently that procedure does not coreectly subtract a TCharSet from self resulting in an inverted range bounds that may cause an error in FPC. Could someone confirm this using the joined CharSets unit, and the limited test grammar joined here.
eol = CHR(13) . Special = '"' + "%&'()*+,-./:;<=>?|". Digit = "0123456789" . Letter = CHR(33)..CHR(127) - Special - Digit . /* CocoDelphi accepts CHR(255) */Causes Subtract "#33,35-36,48-57,64-123,125-127" and "48-57" ->"#33,35-36,58-47,125-127" ERROR : from > To Range : 58 <= 47. where 58-47 is an inverted range that is likely to generate some troubles, maybe the one mentioned in https://github.com/VilleKrumlinde/dcocor/issues/2)
Joined RangeUnionBug.atg and modified CharSets. Note that the CharSets contains embryos of further development and should not impact the described error.
atg.zip